00461naa a2200169 4500 135660 ES-MaBCM 20241016182847.0 060918s2006 gbr|r0p 0 ||eng d xx (OCoLC)1365206981 ES-MaBCM Still blue : Lake Baikal Protección del medio ambiente 59954 En: The economist London 104401 Vol. 380, no. 8494 (2006), p. 30 AREV 135660 135660 0 0 0 0 BC BC 2012-04-21 0 2012-04-21 AREV